hi guys..actually i just want to ask you about AVGPOWER in Matlab..this function tell us about average power a signal.so, if we want to use that function in GUI how we can do that? i mean what should we d first?i have some code:

% compute the power spectrum, telling the FFT to use length(x) as the number of%points in the FFT, and to use the sampling frequency 256Hz.[P,f] = periodogram(x2,[],length(x2),256);%the function returns a vector of frequencies at which the FFT was computed, f,%and the power at each frequency, P.